Dynamex Inc. (DDMX) surged 11.27 percent to $23.50 in the after-market trading. The company said it has received a superior proposal to be acquired for $23.50 a share from a party that was designated as an excluded party from merger talks. The offer is higher than the $21.25 a share that entities controlled by Greenbriar Equity Group LLC had proposed. The stock might open at a new 52-week high during the regular trading on Wednesday.

O'Charley's Inc. (CHUX) jumped 3.05 percent to $7.10 in the after-market trading. The company said it received a non-binding offer for the purchase and leaseback of its owned restaurants. The proposed financing for the offer, which did not specify a price, would be substantially in excess of the interest rate on its bonds.

SmartHeat Inc. (HEAT) rose 2.02 percent to $5.05 in the after-market trading. The company said it has closed its public offering of 5.74 million common shares at $5 a share. The company received net proceeds of $27.26 million, after underwriting discounts and commissions but before offering expenses.

SmartHeat plans to use the net proceeds from the sale of the common stock for general corporate purposes and potential acquisitions, although no specific acquisition candidate has been identified to date.

LTX-Credence Corp. (LTXC) gained 1.78 percent to $7.99 in the after-market trading. The company's first quarter adjusted profit was $21.3 million or 42 cents a share, compared to a loss of $966,000 or 2 cents a share last year. Sales rose to $75.7 million from $41.9 million. Analysts had expected profit of 37 cents a share on revenue of $77.32 million.

LTX-Credence expects second quarter adjusted earnings of 11 cents to 16 cents a share and revenue of $53 million to $58 million. Analysts expect profit of 26 cents a share on revenue of $67.42 million.

ChinaCast Education Corp. (CAST) moved up 1.48 percent to $7.83 in the after-market trading.

Oracle Corp. (ORCL) rose 1.36 percent to $27.56 in the after-hours session. SAP AG (SAP), which is charged of software theft by Oracle, has been ordered by a U.S. Federal Court to pay Oracle $1.3 billion in damages, the largest ever amount awarded for software piracy.